This should work just fine as long as the breaker it is going to is at least 20 amps as this is the amount of amps that both fans would be drawing at once if the were both on. The 12/2 wire should be plenty to supply the 20 amps needed for the fans.
Tell me what you are wanting to accomplish. Are you wanting to run each fan off a separate switch in the same duplex box? The reason I ask is because you are using 12/3 wire to the fans. If you are just going to have 2 switches then you are only going to have power to each fan from each switch. Therefore there is no need to run 12/3 wire. 12/2 is all that is needed and you would simply tie the fan and light wires to that one power source at the light/fan. Now if you are wanting to have a switch for the light and another switch for the fan at each location then that will take 4 switches. You can buy double stack switches and have 4 switches in a double gang box. Is this new construction or old? Please explain what you are wanting and I will be more than happy to explain how to wire it.
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Would this work or burn out fans? Amps on one fan is 1.5 and the other is 5 amps I want to run a 12/2 wire from the panel and to the duplex switch and tie it into a 12/3 wire that goes to switch to fans. The black hot wire on the 12/2 would go to the black common feed screw with fin attached and ground to green screw. The white wire would be tied into the white wire on the 12/3. The wires on the 12/3,ground to ground wires at switch, red to top gold screw for fan 1 and black to bottom screw for fan two.The white wire would continue on to a junction box The red ,black and ground of the same 12/3 wire would also go to the junction box. From the junction box, the red wire would tie into black wire from fan 1. The black wire would tie into the black wire on fan 2. Both white wires from fans 1 and 2 would tie into white wire at junction box. The ground wires from fans 1 and 2 would also tie into the ground wire at JB
Would this work or burn out fans? Amps on one fan is 1.5 and the other is 5 amps I want to run a 12/2 wire from the panel and to the duplex switch and tie it into a 12/3 wire that goes to switch to fans. The black hot wire on the 12/2 would go to the black common feed screw with fin attached and ground to green screw. The white wire would be tied into the white wire on the 12/3. The wires on the 12/3,ground to ground wires at switch, red to top gold screw for fan 1 and black to bottom screw for fan two.The white wire would continue on to a junction box The red ,black and ground of the same 12/3 wire would also go to the junction box. From the junction box, the red wire would tie into black wire from fan 1. The black wire would tie into the black wire on fan 2. Both white wires from fans 1 and 2 would tie into white wire at junction box. The ground wires from fans 1 and 2 would also tie into the ground wire at JB
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